Starship's goal is to bring the cost per kg to space down to about $10, or about $4.50 per pound. If they succeed, and it's increasingly looking like they will, this will revolutionize space. The main reason we can't do anything fun in space right now is because costs are simply too high. The Space Shuttle cost about $54,500/kg to send something to orbit. [1] The Falcon 9 brought that way down to $2,720/kg. And the Falcon Heavy then brought it down even lower yet to around the $1400/kg mark. These are all near unbelievably reductions in costs, but the costs started out so astronomical that even at the point of $1400/kg you still just can't do anything too terribly interesting in space. It's just too much money. But at $10/kg? That's suddenly completely swinging open the gates to the mass commercialization and exploitation of space.

The ISS was a massive and global project largely because of the unbelievable costs involved in getting it up into space. But the ISS is actually relatively tiny, and only weighs about 450,000kg. We now may be able to send the combined mass of the ISS up into space for as little as $4.5 million (contrasted against $25 billion on the space shuttle)! This really feels surreal, like somehow I cannot even believe what I'm saying myself. But, to the best of my knowledge, it is all 100% accurate. And if so, we are on the verge of a revolution in human civilization that would be difficult to compare anything in our species' history. Cool time to be alive!

[1] - https://ntrs.nasa.gov/citations/20200001093